The Cisco TAPI driver for the correct version of Call Manager must be installed manually first.
TCP: 2000 (SCCP)
The Cisco Unified Communications Manager (Call Manager) runs on PC-based platform. It is configured through the HTML-based programming interface.
Firmware Requirements (for new installations):
5 or later
The TAPI driver requires that a user to be configured on the Call Manager that can control all relevant extensions.